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Electrotransport Characteristics of Ceramic and Single Crystal Materials with the (ZrO2)0.89(Sc2O3)0.10(Y2O3)0.01 Composition

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Abstract

The comparative analysis of electrotransport characteristics and structure of ceramic and single crystal solid electrolytes with the (ZrO2)0.89(Sc2O3)0.10(Y2O3)0.01 composition is carried out before and after their life tests. It is shown that before the life tests, the specific conductivities of single-crystal and ceramic materials virtually coincide. During the 3000 h life tests, the specific ionic conductivity decreases for both single crystal and ceramic samples down to about 0.1 S cm–1 but the degradation of conductivity in single crystal proceeds more slowly as compared with the ceramic material. The reason for degradation of electrotransport characteristics in the single crystal is associated with the transition of its bulk structure from the t′′ phase to a phase with the higher degree of tetragonality, whereas in the ceramic material, in addition to the latter process, a rhombohedral phase appears presumably along grain boundaries.

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Correspondence to I. E. Kuritsyna.

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Original Russian Text © I.E. Kuritsyna, S.I. Bredikhin, D.A. Agarkov, M.A. Borik, A.V. Kulebyakin, F.O. Milovich, E.E. Lomonova, V.A. Myzina, N.Yu. Tabachkova, 2018, published in Elektrokhimiya, 2018, Vol. 54, No. 6, pp. 554–560.

Presented at the IV All-Russian Conference “Fuel Cells and Fuel Cell based Power Plants” (with international participation) June 25‒29, 2017, Suzdal, Vladimir region.

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Kuritsyna, I.E., Bredikhin, S.I., Agarkov, D.A. et al. Electrotransport Characteristics of Ceramic and Single Crystal Materials with the (ZrO2)0.89(Sc2O3)0.10(Y2O3)0.01 Composition. Russ J Electrochem 54, 481–485 (2018). https://doi.org/10.1134/S1023193518060125

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  • DOI: https://doi.org/10.1134/S1023193518060125

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